请求fall,fall down的区别.今天老师给我们默写,中文是：她发现他自己正在坠落.我写的英文是：She found that she was falling.可老师说这是错的,必须要用fall down.这我就有点不明白了.fall down不是摔倒

fall off fall over fall behind fall down 区别的 fall down和fall off的区别 fall down和fall of和fall from的区别 请问fall off,fall to与fall down的区别 fall off 、fall down、 fall over区别 fall over fall off fall down 请求翻译 fall down. fall through. fall over. fall on 区别 fall down fall off all over fall on falling 这几个词的区别.题目再清楚些fall down fall off fall over fall on falling fall down和fall into 的区别是什么 fall off 与fall down的区别?它们怎么用? fall off 与 fall down 区别 fall down fall off fall into 的区别 别抄前面的 fall off,fall down,fall from的用法和区别.最好有例子. fall down 和fall off以及 fall from的区别是什么 请问 fall down fall off fall away有什么区别? fall off与fall down与fall into区别 fall down into,fall down,fall down onto,fall into有什么区别 fall down的意思